1 /* sem.cc: XSI IPC interface for Cygwin.
3 Copyright 2003, 2004, 2009 Red Hat, Inc.
5 This file is part of Cygwin.
7 This software is a copyrighted work licensed under the terms of the
8 Cygwin license. Please consult the file "CYGWIN_LICENSE" for
16 #include "cygserver_sem.h"
20 * client_request_sem Constructors
23 client_request_sem::client_request_sem (int semid,
27 : client_request (CYGSERVER_REQUEST_SEM, &_parameters, sizeof (_parameters))
29 _parameters.in.semop = SEMOP_semctl;
30 ipc_set_proc_info (_parameters.in.ipcblk);
32 _parameters.in.ctlargs.semid = semid;
33 _parameters.in.ctlargs.semnum = semnum;
34 _parameters.in.ctlargs.cmd = cmd;
35 _parameters.in.ctlargs.arg = arg;
37 msglen (sizeof (_parameters.in));
40 client_request_sem::client_request_sem (key_t key,
43 : client_request (CYGSERVER_REQUEST_SEM, &_parameters, sizeof (_parameters))
45 _parameters.in.semop = SEMOP_semget;
46 ipc_set_proc_info (_parameters.in.ipcblk);
48 _parameters.in.getargs.key = key;
49 _parameters.in.getargs.nsems = nsems;
50 _parameters.in.getargs.semflg = semflg;
52 msglen (sizeof (_parameters.in));
55 client_request_sem::client_request_sem (int semid,
58 : client_request (CYGSERVER_REQUEST_SEM, &_parameters, sizeof (_parameters))
60 _parameters.in.semop = SEMOP_semop;
61 ipc_set_proc_info (_parameters.in.ipcblk);
63 _parameters.in.opargs.semid = semid;
64 _parameters.in.opargs.sops = sops;
65 _parameters.in.opargs.nsops = nsops;
67 msglen (sizeof (_parameters.in));
71 * XSI semaphore API. These are exported by the DLL.
75 semctl (int semid, int semnum, int cmd, ...)
77 union semun arg = {0};
78 if (cmd == IPC_STAT || cmd == IPC_SET || cmd == IPC_INFO || cmd == SEM_INFO
79 || cmd == GETALL || cmd == SETALL || cmd == SETVAL)
83 arg = va_arg (ap, union semun);
86 syscall_printf ("semctl (semid = %d, semnum = %d, cmd = %d, arg.val = 0x%x)",
87 semid, semnum, cmd, arg.val);
89 if (efault.faulted (EFAULT))
91 client_request_sem request (semid, semnum, cmd, &arg);
92 if (request.make_request () == -1 || request.retval () == -1)
94 syscall_printf ("-1 [%d] = semctl ()", request.error_code ());
95 set_errno (request.error_code ());
96 if (request.error_code () == ENOSYS)
100 return request.retval ();
104 semget (key_t key, int nsems, int semflg)
106 syscall_printf ("semget (key = %U, nsems = %d, semflg = 0x%x)",
108 client_request_sem request (key, nsems, semflg);
109 if (request.make_request () == -1 || request.retval () == -1)
111 syscall_printf ("-1 [%d] = semget ()", request.error_code ());
112 set_errno (request.error_code ());
113 if (request.error_code () == ENOSYS)
117 return request.retval ();
121 semop (int semid, struct sembuf *sops, size_t nsops)
123 syscall_printf ("semop (semid = %d, sops = %p, nsops = %d)",
126 if (efault.faulted (EFAULT))
128 client_request_sem request (semid, sops, nsops);
129 if (request.make_request () == -1 || request.retval () == -1)
131 syscall_printf ("-1 [%d] = semop ()", request.error_code ());
132 set_errno (request.error_code ());
133 if (request.error_code () == ENOSYS)
137 return request.retval ();